Reinhardt,<br><br>I know exactly what you mean. After trying more than 10 brands of fly spray I found one that worked ( no mosquitoes & the flies dropped dead after landing). Here in the Upper Midwest of the US we get horse flies, deer flies, and house flies plus mosquitoes from March through October depending on weather. Late fall is the best time to ride after the first hard frost. <br><br>Craig in Wisconsin